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Activity Details

CE_34T Wed, 8/7/2013, 1:00 PM - 2:45 PM W-Ville-Marie
Overview of New Features in StatXact® 10 and LogXact® 10  — Continuing Education CTW
ASA , Cytel Software Corporation
Instructor(s): Nitin R. Patel, Cytel Software Corporation, Pralay Senchaudhuri, Cytel Software Corporation
"Small and sparse samples of correlated categorical data arise frequently in applied research often with clustered observations. StatXact 10 offers several new statistical tests for analyzing such data. We'll discuss exact correlated-data analogs for conventional tests including Fisher's exact test, the trend test, Wilcoxon and Kruskal-Wallis tests for doubly-ordered tables. Using practical examples, appropriate use of these tests in StatXact 10 - and in a new version of StatXact PROC for SAS users - will be demonstrated. Research by Firth, Heinze, and others has led to methods for bias corrected estimates in logistic regression. The methods also provide penalized maximum likelihood estimates of parameters in the case of complete separation where maximum likelihood estimates do not exist. Algorithms for these methods have been implemented in LogXact 10. We will discuss these methods and their us in LogXact 10 and new LogXact PROC for SAS users. We will also briefly discussBayesian estimation in Logistic Regression, a topic we are considering for future versions of LogXact "

2013 JSM Online Program Home

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